Add 15/42 and 12/80
15/42 + 12/80 is 71/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
15/42 = 15 × 40/42 × 40 = 600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
12/80 = 12 × 21/80 × 21 = 252/1680 - Add the two like fractions:
600/1680 + 252/1680 = 600 + 252/1680 = 852/1680 - 852/1680 simplified gives 71/140
- So, 15/42 + 12/80 = 71/140
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